If you only need one rotating limb it's fairly easy. It will take a few experiments to find out what axis is used for rotation. I think everything rotates around the wings3d x axis. Arrange the model in wings so the bit you want to rotate is seperate from the rest of the model and alligned correctly.
Then load it into dbpro and use the rotate limb command to rotate the limb.
example dbpro project
http://winch.dbpcommunity.com/temp/turret.zip
If you need more than one rotating limb it's a fair bit more effort, you need to make seperate files for each limb, load them into dbpro. Then position and use glue object to limb.
dbpro : p166mmx @ 233 : 256mb : sb 128pci : sis onboard